CN104135002B - Alternating expression power factor corrector - Google Patents
Alternating expression power factor corrector Download PDFInfo
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- CN104135002B CN104135002B CN201410331998.3A CN201410331998A CN104135002B CN 104135002 B CN104135002 B CN 104135002B CN 201410331998 A CN201410331998 A CN 201410331998A CN 104135002 B CN104135002 B CN 104135002B
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- pwm control
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The present invention proposes a kind of alternating expression power factor corrector, including：First PFC module；Second PFC module；Current detection module, for detecting by electric current I1, the electric current I2 by second switch device in the second PFC module of first switch device in the first PFC module and by first switch device and the electric current Iin of second switch device；Voltage detection module, the output voltage U2 for detecting the voltage U1 and alternating expression power factor corrector that are input to alternating expression power factor corrector；Control module, second pwm control signal of the first pwm control signal and control second switch device according to electric current I1, electric current I2, electric current Iin, voltage U1, voltage U2 and default target output voltage generation control first switch device, wherein, the first pwm control signal and second half carrier cycle of pwm control signal mutual deviation.Alternating expression power factor corrector of the invention has lower circuit cost.
Description
Technical field
The present invention relates to field of circuit technology, more particularly to a kind of alternating expression power factor corrector.
Background technology
In order to reduce the pollution of current harmonics and reactive power produced by electrical equipment to power network, the electric current of electrical equipment
Harmonic wave need to meet certain harmonic standard.In order that electrical equipment meets harmonic standard, PFC need to be carried out to it
(PFC, Power Factor Correction).In this context, multiple power factor correcting technology is suggested, and is applied to
In electric equipment.
Because interleaved PFC scheme has, harmonic current is small, high reliability, is just more and more paid attention to.
Using the boost type boost circuit structures that two-way is symmetrical more than current interleaved PFC scheme.Although circuit structure is symmetrical, by
There is certain otherness in components such as inductance, be still likely to result in the symmetrical boost type booster circuits electric current of two-way uneven
Weighing apparatus, so as to cause a switch tube current excessive.When switch tube current reaches to a certain degree, it is possible to switch can be burnt out
Pipe so that circuit global failure.Therefore, interleaved PFC scheme, will also be to double switch in addition to PFC to be carried out
Pipe carries out current balance type control.
In correlation technique, propose following two schemes to realize carrying out current balance type control to double switch pipe.Wherein, side
Case one proposes a kind of boost type booster circuit total current symmetrical to two-way and wherein boost types booster circuit electric current all the way
The power factor correcting sampled respectively.The power factor correcting is by the symmetrical boost type booster circuits of two-way
Total current and the wherein difference of boost types booster circuit electric current all the way, as the estimation of another road boost types booster circuit electric current
Value, and current balance type control is carried out to double switch pipe according to the estimate.Scheme two proposes a kind of respectively to double switch
Pipe carries out the interleaved PFC scheme of current sample.The program need not gather the symmetrical boost type booster circuits total current of two-way just
The dutycycle of switching tube can be calculated and current balance type is realized.
However, the two schemes in above-mentioned correlation technique all at least need two current sensors, could realize to two-way
Switching tube carries out the interleaved PFC scheme of current balance type control, therefore circuit cost is higher.
The content of the invention
The purpose of the present invention is intended at least solve one of above-mentioned technical problem to a certain extent.
Therefore, it is an object of the invention to propose a kind of alternating expression power factor corrector, the alternating expression power factor school
Positive utensil has lower circuit cost.
To reach above-mentioned purpose, the embodiment of the present invention proposes a kind of alternating expression power factor corrector, the alternating expression work(
Rate factor corrector includes：First PFC module, first PFC module includes the first energy storage inductor, first switch device and the
One fast recovery diode；Second PFC module, second PFC module and first PFC module are parallel with one another, and described second
PFC module includes the second energy storage inductor, second switch device and the second fast recovery diode, the transmitting of the second switch device
Pole be connected with the emitter stage of the first switch device and between have first node；Current detection module, the current detecting
Module is connected with the first node, and the current detection module is used for the electric current that detection passes through the first switch device respectively
I1, the electric current I2 by the second switch device and by the first switch device and the electric current of second switch device
Iin；Voltage detection module, the voltage detection module is used to detect the voltage for being input to the alternating expression power factor corrector
The output voltage U2 of U1 and the alternating expression power factor corrector；And control module, the control module respectively with it is described
Current detection module, the control end of the voltage detection module and the first switch device, the control of the second switch device
End processed is connected, and the control module is according to the electric current I1, the electric current I2, the electric current Iin, the voltage U1, the electricity
First PWM (the Pulse Width of pressure U2 and the default target output voltage generation control first switch device
Modulation, pulse width modulation) control signal and the control second switch device the second pwm control signal, wherein,
Half carrier cycle of first pwm control signal and the second pwm control signal mutual deviation.
The alternating expression power factor corrector that the embodiment of the present invention is proposed, detects by first in current detection module
The electric current I1 of first switch device, the electric current I2 by second switch device in the second PFC module and by PFC module
After the electric current Iin of one switching device and second switch device, and voltage detection module is detected and is input to alternating expression power factor
After the voltage U1 of the adjuster and output voltage U2 of alternating expression power factor corrector, and then control module is according to electric current I1, electricity
The control the of stream I2, electric current Iin, voltage U1, voltage U2 and default target output voltage generation half carrier cycle of mutual deviation
First pwm control signal of one switching device and the second pwm control signal of control second switch device.The alternating expression power because
Number adjuster can carry out current balance type control, and tool to the electric current I2 of the electric current I1 of first switch device and second switch device
There is lower circuit cost.
Further, in one embodiment of the invention, when the service time and described of the first switch device
When the service time of two switching devices is completely misaligned, the current detection module is in the first switch device and opens shape
The electric current I1 is detected during state, and the electric current I2 is detected when the second switch device is in opening state, and according to
The electric current I1 and the electric current I2 are calculated the electric current Iin.
Further, in one embodiment of the invention, when the service time and described of the first switch device
When the service time of two switching devices partially overlaps, wherein, the current detection module is in the first switch device and opens
Logical state and the electric current I1 is detected when the second switch device is closed, and be in the second switch device
Opening state and the electric current I2 is detected when the first switch device is closed, and according to the electric current I1 and institute
State electric current I2 and be calculated the electric current Iin；Or the current detection module is in the first switch device and opens shape
State and the electric current I1 is detected when the second switch device is closed, and be in the second switch device open-minded
State and the electric current I2 is detected when the first switch device is closed, and be in the first switch device
Opening state and the second switch device detect the electric current Iin when being in opening state；Or the current detection module
The electric current I1 is detected when the first switch device is in opening state and the second switch device is closed,
And detect the electric current when the first switch device is in opening state and the second switch device is in opening state
Iin, and the electric current I2 is calculated according to the electric current I1 and the electric current Iin；Or the current detection module exists
The second switch device is in when opening state and the first switch device are closed and detects the electric current I2, and
The electric current is detected when the first switch device is in opening state and the second switch device is in opening state
Iin, and the electric current I1 is calculated according to the electric current I2 and the electric current Iin.
Further, in one embodiment of the invention, the control module is further included：PFC control units, institute
PFC control units are stated in each described carrier cycle according to the electric current Iin, the voltage U1, the voltage U2 and institute
State default target output voltage and generate the first duty cycle signals；Dutycycle adjustment unit, the dutycycle adjustment unit according to
The electric current I1 and electric current I2 calculates dutycycle adjustment amount；First computing unit, first computing unit is according to
First duty cycle signals and the dutycycle adjustment amount calculate the duty cycle signals of the first switch device；Second calculates single
Unit, second computing unit calculates the second switch according to first duty cycle signals and the dutycycle adjustment amount
The duty cycle signals of device；First sawtooth waveforms generation unit, the first sawtooth waveforms generation unit is used to export the first sawtooth waveforms
Signal；Second sawtooth waveforms generation unit, the second sawtooth waveforms generation unit is used to export the second sawtooth signal；First PWM
Control signal generation unit, duty cycle signals of the first pwm control signal generation unit according to the first switch device
First pwm control signal is generated with first sawtooth signal；And the second pwm control signal generation unit, it is described
Second pwm control signal generation unit is given birth to according to the duty cycle signals of the second switch device and second sawtooth signal
Into second pwm control signal.
Further, in one embodiment of the invention, the dutycycle adjustment unit calculates institute according to below equation
State dutycycle adjustment amount：
Wherein, Sum (k) is the integrated value that k-th carrier cycle is calculated, and Sum (k-1) is -1 carrier cycle meter of kth
The integrated value for calculating, k is the integer more than or equal to 1, and I1 (k) and I2 (k) is respectively electric current I1 described in k-th carrier cycle and institute
The sampled value of electric current I2 is stated, T is the time span of the carrier cycle, and Kp and Ki is respectively proportional control factor and integration control
Coefficient, Δ D is the dutycycle adjustment amount.
Further, in one embodiment of the invention, the duty cycle signals of the first switch device and described
The duty cycle signals of two switching devices are calculated according to below equation：
Wherein, D1 is the duty cycle signals of the first switch device, and D2 is the dutycycle letter of the second switch device
Number, Dtotal is first duty cycle signals, and Δ D is the dutycycle adjustment amount.
Further, in one embodiment of the invention, first sawtooth signal is represented according to below equation：
F (t)=[t- (k-1) T]/T, (k-1) T<t≤kT
Wherein, F (t) is first sawtooth signal, and T is the time span of the carrier cycle, and k is more than or equal to 1
Integer.
Further, in one embodiment of the invention, if the duty cycle signals of the first switch device and institute
The difference of the first sawtooth signal is stated more than 0, the first pwm control signal generation unit output 1, otherwise, the PWM controls
Signal generation unit output 0 processed；And if the duty cycle signals of the second switch device and second sawtooth signal
Difference be more than 0, the second pwm control signal generation unit output 1, otherwise, the second pwm control signal generation unit is defeated
Go out 0.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by practice of the invention.
Brief description of the drawings
The above-mentioned and/or additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and be readily appreciated that, wherein：
Fig. 1 is the block diagram of the alternating expression power factor corrector according to the embodiment of the present invention；
Fig. 2 is the schematic diagram of the detection electric current of the alternating expression power factor corrector according to one embodiment of the invention；
Fig. 3 is the schematic diagram of the detection electric current of the alternating expression power factor corrector according to another embodiment of the present invention；
Fig. 4 is the schematic diagram of the detection electric current of the alternating expression power factor corrector according to further embodiment of the present invention；
Fig. 5 is that the square frame of the control module of the alternating expression power factor corrector according to one embodiment of the invention is illustrated
Figure；
Fig. 6 is the duty cycle signals of the alternating expression power factor corrector according to one embodiment of the invention, sawtooth waveforms letter
Number and pwm control signal schematic diagram；And
Fig. 7 is that the waveform of the output current of the alternating expression power factor corrector according to one embodiment of the invention is illustrated
Figure.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
It is exemplary to scheme the embodiment of description, is only used for explaining the present invention, and is not construed as limiting the claims.
Following disclosure provides many different embodiments or example is used for realizing different structure of the invention.For letter
Change disclosure of the invention, hereinafter the part and setting to specific examples are described.Certainly, they are only merely illustrative, and
Purpose does not lie in the limitation present invention.Additionally, the present invention can in different examples repeat reference numerals and/or letter.It is this heavy
It is again the relation between itself not indicating discussed various embodiments and/or setting for purposes of simplicity and clarity.This
Outward, the invention provides various specific technique and material example, but those of ordinary skill in the art can be appreciated that
The use of the applicable property and/or other materials of other techniques.In addition, fisrt feature described below second feature it
" on " structure can include that the first and second features be formed as the embodiment of directly contact, it is also possible to including other feature shape
Into the embodiment between the first and second features, such first and second feature may not be directly contact.
In the description of the invention, it is necessary to explanation, unless otherwise prescribed and limit, term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be mechanically connect or electrical connection, or two connections of element internal, can
Being to be joined directly together, it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
The alternating expression power factor corrector 1 of proposition according to embodiments of the present invention described with reference to the accompanying drawings.
As shown in figure 1, the alternating expression power factor corrector 1 of the embodiment of the present invention includes：First PFC module 10, second
PFC module 20, current detection module 30 such as current sensor, such as voltage sensor of voltage detection module 40 and control mould
Such as MCU of block 50 (Micro Control Unit, micro-control unit).Wherein, the first PFC module 10 includes the first energy storage inductor
L1, first switch device Q1 and the first fast recovery diode D1.Second PFC module 20 and the first PFC module 10 are parallel with one another, the
Two PFC modules 20 include the second energy storage inductor L2, second switch device Q2 and the second fast recovery diode D2, second switch device
The emitter stage of Q2 be connected with the emitter stage of first switch device Q1 and between have first node J1.First energy storage inductor L1 and
The inductance value of two energy storage inductor L2 is between 100uH to 9mH.Current detection module 30 is connected with first node J1, current detecting
Module 30 is used for detection respectively by electric current I1, the electric current I2 by second switch device Q2 of first switch device Q1 and leads to
Cross the total electric current Iin of first switch device Q1 and second switch device Q2.Voltage detection module 40 is input to staggeredly for detection
The voltage U1 of the formula power factor corrector 1 and output voltage U2 of alternating expression power factor corrector 1.Control module 50 respectively with
Current detection module 30, the control end of voltage detection module 40 and first switch device Q1, the control end of second switch device Q2
It is connected, control module 50 is according to electric current I1, electric current I2, electric current Iin, voltage U1, voltage U2 and default target output voltage
The 2nd PWM controls of first pwm control signal and control second switch device Q2 of Vref generation control first switch devices Q1
Signal, wherein, the carrier cycle of the first pwm control signal and the second pwm control signal is equal and half carrier cycle of mutual deviation.
It should be noted that it should be noted that the first PFC module 10 and the composition two-way of the second PFC module 20 are symmetrical
Boost type booster circuits.In addition, current detection module 30 can become electric current I1, electric current I2 and the electricity of analog quantity of changing commanders by AD
Stream Iin is transformed to digital output to control module 50, and same voltage detection module 40 can also become analog quantity of changing commanders by AD
Voltage U1 and voltage U2 be transformed to digital output to control module 50.
Specifically, in one embodiment of the invention, as shown in figure 1, the input of alternating expression power factor corrector 1
Can be connected with rectifier bridge 60, the output end of alternating expression power factor corrector 1 can be connected with electrical equipment 70, wherein, it is whole
Stream bridge 60 is used to carry out rectification to the alternating current of AC power AC outputs.First output end of rectifier bridge 60 respectively with the first energy storage
One end of inductance L1 is connected with one end of the second energy storage inductor L2, the second output head grounding of rectifier bridge 60, the first energy storage inductor
The other end of L1 is connected with the colelctor electrode of first switch device Q1 and the anode of the first fast recovery diode D1 respectively, and first is fast extensive
The negative electrode of multiple diode D1 is connected with one end of electrical equipment 70, the other end of the second energy storage inductor L2 respectively with second switch device
The anode of the colelctor electrode of part Q2 and the second fast recovery diode D2 is connected, the negative electrode and electrical equipment of the second fast recovery diode D2
70 one end is connected, the other end ground connection of electrical equipment 70.First switch device Q1 opened according to the first pwm control signal and
Shut-off, second switch device Q2 is turned on and off according to the second pwm control signal, so as to realize the input to electrical equipment 70
Electric current carries out PFC harmonic suppression, and realization carries out electricity to first switch device Q1 and second switch device Q2
Mobile equilibrium is controlled.
In addition, in one embodiment of the invention, as shown in figure 1, alternating expression power factor corrector 1 can also include
Current sample module 80, first voltage sampling module 90 and second voltage sampling module 100.Wherein, the first current sample module
80 can be first resistor R1, and one end of first resistor R1 is connected with first node J1, the other end ground connection of first resistor R1.The
One voltage sample module 90 can include the second resistance R2 and 3rd resistor R3 of series connection, second resistance R2 and 3rd resistor R3 it
Between there is Section Point J2, one end of second resistance R2 is connected with the first output end of rectifier bridge 60, one end of 3rd resistor R3
Ground connection, the first input end of voltage detection module 40 is connected with Section Point J2.Second voltage sampling module 100 can include string
The 4th resistance R4 and the 5th resistance R5 of connection, have the 3rd node J3, the 4th resistance between the 4th resistance R4 and the 5th resistance R5
One end of R4 is connected with the negative electrode of the first fast recovery diode D1 and the negative electrode of the second fast recovery diode D2 respectively, the 5th resistance
One end ground connection of R5, the second input of voltage detection module 40 is connected with the 3rd node J3.
Further, in one embodiment of the invention, the service time as first switch device Q1 and second switch
When the service time of device Q2 is completely misaligned, current detection module 30 is detected when first switch device Q1 is in opening state
Electric current I1, and electric current I2 is detected when second switch device Q2 is in opening state, and calculated according to electric current I1 and electric current I2
Obtain electric current Iin.
Specifically, in one embodiment of the invention, as shown in Fig. 2 current detection module 30 can be in first switch
Device Q1 is in the time intermediate point of opening state, and the voltage-to-ground to first node J1 detects, and using detected value as
Electric current I1, and the time intermediate point of opening state is in second switch device Q2, the voltage-to-ground to first node J1 enters
Row detection, and using detected value as electric current I2, electric current Iin=I1+I2.
Further, in another embodiment of the present invention, opened with second when the service time of first switch device Q1
When the service time for closing device Q2 partially overlaps, wherein, current detection module 30 is in opening state in first switch device Q1
And second switch device Q2 detects electric current I1 when being closed, and opening state and first are in second switch device Q2
Electric current I2 is detected when switching device Q1 is closed, and electric current Iin is calculated according to electric current I1 and electric current I2.Or
Current detection module 30 is detected when first switch device Q1 is in opening state and second switch device Q2 is closed
Electric current I1, and detect electric current when second switch device Q2 is in opening state and first switch device Q1 is closed
I2, and the detection electric current Iin when first switch device Q1 is in opening state and second switch device Q2 is in opening state.
Or current detection module 30 is when first switch device Q1 is in opening state and second switch device Q2 is closed
Detection electric current I1, and the detection electricity when first switch device Q1 is in opening state and second switch device Q2 is in opening state
Stream Iin, and electric current I2 is calculated according to electric current I1 and electric current Iin.Or current detection module 30 is in second switch device
Q2 is in when opening state and first switch device Q1 are closed and detects electric current I2, and is in first switch device Q1
Opening state and second switch device Q2 detect electric current Iin when being in opening state, and are calculated according to electric current I2 and electric current Iin
Obtain electric current I1.
Specifically, in one embodiment of the invention, as shown in figure 3, current detection module 30 can be in first switch
Device Q1 is in the time intermediate point of opening state, and the voltage-to-ground to first node J1 detects, and using detected value as
Electric current I1, and the time intermediate point of opening state is in second switch device Q2, the voltage-to-ground to first node J1 enters
Row detection, and using detected value as electric current I2, and be in opening shape in first switch device Q1 and second switch device Q2
The time intermediate point of state, the voltage-to-ground to first node J1 detects, and using detected value as electric current Iin.
Further, in yet another embodiment of the present invention, under steady state conditions, a reactor, in first switch device Q1 and second
When the input current of switching device Q2 is close to zero, the service time of first switch device Q1 is open-minded with second switch device Q2
Time may be completely superposed, and when the service time of first switch device Q1 weighs completely with the service time of second switch device Q2
During conjunction, current detection module 30 can only detect electric current Iin, and cannot detect electric current I1 and electric current I2.
For example, in one embodiment of the invention, as shown in figure 4, in first switch device Q1 and second switch device
When Q2 is in opening state, first switch device Q1 be in opening state time intermediate point to first node J1 over the ground
Voltage is detected, or is in the voltage-to-ground of the time intermediate point to first node J1 of opening state in second switch device Q2
Detected, detected value is electric current Iin, wherein, T1 is first carrier cycle, and T1 is second carrier cycle.But due to
Now the input current of first switch device Q1 and second switch device Q2 is close to zero, so first switch device need not be considered
The current balance type of Q1 and second switch device Q2.In fact, the service time of first switch device Q1 and second switch device Q2
Service time be completely superposed appearance probability it is very low, have no effect on the alternating expression power factor corrector 1 of the embodiment of the present invention
The general effect of current balance type control is carried out to first switch device Q1 and second switch device Q2.
It should be noted that in Fig. 2, Fig. 3 and Fig. 4, when the first pwm control signal is high level, first switch device
Q1 is open-minded, and when the first pwm control signal is low level, first switch device Q1 shut-offs are electricity high in the second pwm control signal
Usually, second switch device Q2 is open-minded, when the second pwm control signal is low level, second switch device Q2 shut-offs.
Further, in one embodiment of the invention, as shown in figure 5, control module 50 may further include：
PFC control units 51, dutycycle adjustment unit 52, the first computing unit 53, the second computing unit 54, the generation of the first sawtooth waveforms are single
First 55, second sawtooth waveforms generation unit 56, the first pwm control signal generation unit 57 and the generation of the second pwm control signal are single
Unit 58.Wherein, PFC control units 51 can be in each carrier cycle based on monocycle algorithm or average current model etc., every
In the carrier cycle of individual first switch device Q1 and in the carrier cycle of each second switch device Q2, according to electric current Iin, voltage
U1, voltage U2 and default target output voltage Vref generate the first duty cycle signals.Dutycycle adjustment unit 52 is according to electricity
Stream I1 and electric current I2 calculates dutycycle adjustment amount.First computing unit 53 is according to the first duty cycle signals and dutycycle adjustment gauge
Calculate the duty cycle signals of first switch device Q1.Second computing unit 54 is according to the first duty cycle signals and dutycycle adjustment amount
Calculate the duty cycle signals of second switch device Q2.First sawtooth waveforms generation unit 55 is used to export the first sawtooth signal.
Second sawtooth waveforms generation unit 56 is used to export the second sawtooth signal.First pwm control signal generation unit 57 is according to first
The duty cycle signals of switching device Q1 and the first sawtooth signal generate the first pwm control signal.Second pwm control signal is generated
Unit 58 generates the second pwm control signal according to the duty cycle signals of second switch device Q2 and the second sawtooth signal.
Further, in one embodiment of the invention, dutycycle adjustment unit 52 can include PID controller, PID
Controller can be according to the mathematic interpolation dutycycle adjustment amount of electric current I1 and electric current I2.Specifically, in one of the invention implementation
In example, dutycycle adjustment unit 52 can calculate dutycycle adjustment amount according to below equation：
Wherein, Sum (k) is the integrated value that k-th carrier cycle is calculated, and Sum (k-1) is -1 carrier cycle meter of kth
The integrated value for calculating, k is the integer more than or equal to 1, and I1 (k) and I2 (k) is respectively k-th carrier cycle electric current I1 and electric current I2
Sampled value, T is the time span of carrier cycle, and Kp and Ki are respectively proportional control factor and integral control coefficient, and Δ D is to account for
Sky compares adjustment amount.
It should be noted that when the service time of first switch device Q1 is complete with the service time of second switch device Q2
During coincidence, current detection module 30 can only detect electric current Iin, and cannot detect electric current I1 and electric current I2, now, it is impossible to according to
Upper formula calculates dutycycle adjustment amount Δ D, and the dutycycle adjustment amount Δ D in current carrier cycle is not updated, continues to remain
The dutycycle adjustment amount Δ D of a upper carrier cycle.
Further, in one embodiment of the invention, the duty cycle signals and second switch of first switch device Q1
The duty cycle signals of device Q2 can be calculated according to below equation：
Wherein, D1 is the duty cycle signals of first switch device Q1, and D2 is the duty cycle signals of second switch device Q2,
Dtotal is the first duty cycle signals, and Δ D is dutycycle adjustment amount.
Further, in one embodiment of the invention, the first sawtooth signal can be represented according to below equation：
F (t)=[t- (k-1) T]/T, (k-1) T<t≤kT
Wherein, F (t) is the first sawtooth signal, and T is the time span of carrier cycle, the span of T in 10 microseconds extremely
Between 60 microseconds, k is the integer more than or equal to 1.
Further, in one embodiment of the invention, the formula of the second sawtooth signal can be F (t-T/2), the
Two sawtooth signals and the first sawtooth signal mutual deviation T/2.
Further, as shown in fig. 6, in one embodiment of the invention, if the dutycycle of first switch device Q1
The difference of signal D1 and the first sawtooth signal F (t) is more than 0, and the first pwm control signal generation unit 57 exports 1, otherwise, first
The output of pwm control signal generation unit 57 0.If the duty cycle signals D2 of second switch device Q2 and the second sawtooth signal F
(t-T/2) difference is more than 0, and the second pwm control signal generation unit 58 exports 1, otherwise, the second pwm control signal generation unit
58 outputs 0.From fig. 6 it can be seen that the carrier cycle of the first pwm control signal and the second pwm control signal is equal and mutual deviation
Half carrier cycle, and export once electricity high in each carrier cycle, the first pwm control signal and the second pwm control signal
It is flat, so that first switch device Q1 and second switch device Q2 are opened once in each carrier cycle, greatly improve
First switch device Q1's and second switch device Q2 opens number of times, effectively inhibits the Harmonics of Input of electrical equipment 70.
Fig. 7 is the waveform diagram of the output current of the alternating expression power factor corrector of one embodiment of the invention.From
As can be seen that the ripple of electric current Iin is significantly less than the ripple of electric current I1 and the ripple of electric current I2 in Fig. 7, and due to electric current
I1 and electric current I2 are balanced control, and electric current I1 and electric current I2 can be consistent substantially.In addition, to using the embodiment of the present invention
Alternating expression power factor corrector electrical equipment carry out many experiments after, test result indicate that, using the embodiment of the present invention
Alternating expression power factor corrector electrical equipment, power factor can reach more than 99%, and Harmonics of Input is also
Effective suppression has been arrived, harmonic standard has been disclosure satisfy that.
The alternating expression power factor corrector that the embodiment of the present invention is proposed, detects by first in current detection module
The electric current I1 of first switch device, the electric current I2 by second switch device in the second PFC module and by PFC module
After the electric current Iin of one switching device and second switch device, and voltage detection module is detected and is input to alternating expression power factor
After the voltage U1 of the adjuster and output voltage U2 of alternating expression power factor corrector, and then control module is according to electric current I1, electricity
The control the of stream I2, electric current Iin, voltage U1, voltage U2 and default target output voltage generation half carrier cycle of mutual deviation
First pwm control signal of one switching device and the second pwm control signal of control second switch device.The alternating expression power because
Number adjusters only need the electric current I1 and the electric current I2 of second switch device by a current sensor to first switch device
Carry out current balance type control, greatly save the cost of circuit, and PFC performance, current balance type control performance and
Current harmonics inhibition is good.
Any process described otherwise above or method description in flow chart or herein is construed as, and expression includes
It is one or more for realizing specific logical function or process the step of the module of code of executable instruction, fragment or portion
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussion suitable
Sequence, including function involved by basis by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Represent in flow charts or logic and/or step described otherwise above herein, for example, being considered use
In the order list of the executable instruction for realizing logic function, in may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or with reference to these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
The dress that defeated program is used for instruction execution system, device or equipment or with reference to these instruction execution systems, device or equipment
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：With the electricity that one or more are connected up
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can thereon print described program or other are suitable
Medium, because optical scanner for example can be carried out by paper or other media, then enters edlin, interpretation or if necessary with it
His suitable method is processed electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In implementation method, the software that multiple steps or method can in memory and by suitable instruction execution system be performed with storage
Or firmware is realized.If for example, realized with hardware, and in another embodiment, can be with well known in the art
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, the application specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method is carried
The rapid hardware that can be by program to instruct correlation is completed, and described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
Additionally, during each functional unit in each embodiment of the invention can be integrated in a processing module, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a module.Above-mentioned integrated mould
Block can both be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.The integrated module is such as
Fruit is to realize in the form of software function module and as independent production marketing or when using, it is also possible to which storage is in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention is by appended claims and its equivalent limits.
Claims (7)
1. a kind of alternating expression power factor corrector, it is characterised in that including：
First PFC PFC module, first PFC module includes the first energy storage inductor, first switch device and the
One fast recovery diode；
Second PFC module, second PFC module and first PFC module are parallel with one another, and second PFC module includes
Second energy storage inductor, second switch device and the second fast recovery diode, the emitter stage of the second switch device and described
The emitter stage of one switching device be connected and between there is first node；
Current detection module, the current detection module is connected with the first node, and the current detection module is used to distinguish
Detection is by electric current I1, the electric current I2 by the second switch device of the first switch device and by described first
The electric current Iin of switching device and second switch device；
Voltage detection module, the voltage detection module is used to detect the voltage for being input to the alternating expression power factor corrector
The output voltage U2 of U1 and the alternating expression power factor corrector；And
Control module, the control module is opened with the current detection module, the voltage detection module and described first respectively
Close the control end of device, the control end of the second switch device to be connected, the control module is according to the electric current I1, the electricity
Stream I2, the electric current Iin, the voltage U1, the voltage U2 and default target output voltage generation control described first
Second pwm control signal of the first pwm control signal of switching device and the control second switch device, wherein, described the
Half carrier cycle of one pwm control signal and the second pwm control signal mutual deviation；
Wherein, the control module is further included：
PFC control units, the PFC control units are in each described carrier cycle according to the electric current Iin, the voltage
U1, the voltage U2 and the default target output voltage generate the first duty cycle signals；
Dutycycle adjustment unit, the dutycycle adjustment unit calculates dutycycle adjustment according to the electric current I1 and electric current I2
Amount；
First computing unit, first computing unit is calculated according to first duty cycle signals and the dutycycle adjustment amount
Go out the duty cycle signals of the first switch device；
Second computing unit, second computing unit is calculated according to first duty cycle signals and the dutycycle adjustment amount
Go out the duty cycle signals of the second switch device；
First sawtooth waveforms generation unit, the first sawtooth waveforms generation unit is used to export the first sawtooth signal；
Second sawtooth waveforms generation unit, the second sawtooth waveforms generation unit is used to export the second sawtooth signal；
First pwm control signal generation unit, the first pwm control signal generation unit is according to the first switch device
Duty cycle signals and first sawtooth signal generate first pwm control signal；And
Second pwm control signal generation unit, the second pwm control signal generation unit is according to the second switch device
Duty cycle signals and second sawtooth signal generate second pwm control signal.
2. alternating expression power factor corrector as claimed in claim 1, it is characterised in that when opening for the first switch device
When the logical time is completely misaligned with the service time of the second switch device, the current detection module is in the first switch
Device detects the electric current I1 when being in opening state, and detects the electricity when the second switch device is in opening state
Stream I2, and the electric current Iin is calculated according to the electric current I1 and the electric current I2.
3. alternating expression power factor corrector as claimed in claim 1, it is characterised in that when opening for the first switch device
When the logical time partially overlaps with the service time of the second switch device, wherein,
The current detection module is in opening state in the first switch device and the second switch device is in and closes
Detect the electric current I1 during state, and be in opening state in the second switch device and the first switch device is in and closes
The electric current I2 is detected during closed state, and the electric current Iin is calculated according to the electric current I1 and the electric current I2；Or
The current detection module is in opening state in the first switch device and the second switch device is in and closes
Detect the electric current I1 during state, and be in opening state in the second switch device and the first switch device is in and closes
The electric current I2 is detected during closed state, and is at opening state and the second switch device in the first switch device
The electric current Iin is detected when opening state；Or
The current detection module is in opening state in the first switch device and the second switch device is in and closes
Detect the electric current I1 during state, and be in opening state in the first switch device and the second switch device is in and opens
The electric current Iin is detected during logical state, and the electric current I2 is calculated according to the electric current I1 and the electric current Iin；Or
Person
The current detection module is in opening state in the second switch device and the first switch device is in and closes
Detect the electric current I2 during state, and be in opening state in the first switch device and the second switch device is in and opens
The electric current Iin is detected during logical state, and the electric current I1 is calculated according to the electric current I2 and the electric current Iin.
4. alternating expression power factor corrector as claimed in claim 1, it is characterised in that the dutycycle adjustment unit according to
Below equation calculates the dutycycle adjustment amount：
Wherein, Sum (k) is the integrated value that k-th carrier cycle is calculated, and Sum (k-1) is calculated for -1 carrier cycle of kth
Integrated value, k is the integer more than or equal to 1, and I1 (k) and I2 (k) is respectively electric current I1 described in k-th carrier cycle and the electricity
The sampled value of I2 is flowed, T is the time span of the carrier cycle, and Kp and Ki is respectively proportional control factor and integration control system
Number, Δ D is the dutycycle adjustment amount.
5. alternating expression power factor corrector as claimed in claim 1, it is characterised in that the duty of the first switch device
Duty cycle signals than signal and the second switch device are calculated according to below equation：
Wherein, D1 is the duty cycle signals of the first switch device, and D2 is the duty cycle signals of the second switch device,
Dtotal is first duty cycle signals, and Δ D is the dutycycle adjustment amount.
6. alternating expression power factor corrector as claimed in claim 1, it is characterised in that first sawtooth signal according to
Below equation is represented：
F (t)=[t- (k-1) T]/T, (k-1) T<t≤kT
Wherein, F (t) is first sawtooth signal, and T is the time span of the carrier cycle, and k is whole more than or equal to 1
Number.
7. alternating expression power factor corrector as claimed in claim 1, it is characterised in that
If the difference of the duty cycle signals of the first switch device and first sawtooth signal is more than 0, a PWM
Control signal generation unit output 1, otherwise, the first pwm control signal generation unit output 0；And
If the difference of the duty cycle signals of the second switch device and second sawtooth signal is more than 0, the 2nd PWM
Control signal generation unit output 1, otherwise, the second pwm control signal generation unit output 0.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410331998.3A CN104135002B (en) | 2014-07-11 | 2014-07-11 | Alternating expression power factor corrector |
| DE202014011364.5U DE202014011364U1 (en) | 2014-07-11 | 2014-10-21 | Nested power factor corrector |
| US15/325,522 US10141848B2 (en) | 2014-07-11 | 2014-10-21 | Interleaved power factor corrector |
| PCT/CN2014/089081 WO2016004700A1 (en) | 2014-07-11 | 2014-10-21 | Staggered power factor corrector |
| EP14897047.8A EP3168972A4 (en) | 2014-07-11 | 2014-10-21 | Staggered power factor corrector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410331998.3A CN104135002B (en) | 2014-07-11 | 2014-07-11 | Alternating expression power factor corrector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104135002A CN104135002A (en) | 2014-11-05 |
| CN104135002B true CN104135002B (en) | 2017-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410331998.3A Active CN104135002B (en) | 2014-07-11 | 2014-07-11 | Alternating expression power factor corrector |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3168972A4 (en) |
| CN (1) | CN104135002B (en) |
| DE (1) | DE202014011364U1 (en) |
| WO (1) | WO2016004700A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804978B (en) * | 2014-12-31 | 2017-12-12 | 广东美的制冷设备有限公司 | The control device and control method of compressor in air conditioner |
| CN105846666A (en) * | 2015-01-15 | 2016-08-10 | 珠海格力节能环保制冷技术研究中心有限公司 | Interactive pfc control system |
| US10084383B2 (en) | 2015-03-27 | 2018-09-25 | Mitsubishi Electric Corporation | Booster device and converter device |
| JP6779388B2 (en) | 2017-11-15 | 2020-11-04 | 三菱電機株式会社 | Power converter |
| CN107911015A (en) * | 2017-11-27 | 2018-04-13 | 奥克斯空调股份有限公司 | Circuit of power factor correction and current sample method |
| CN107863882A (en) * | 2017-11-30 | 2018-03-30 | 安徽维新能源技术有限公司 | Buck converter BUCK circuits |
| CN109462335A (en) * | 2018-12-20 | 2019-03-12 | 江苏万帮德和新能源科技股份有限公司 | Crisscross parallel Buck power control circuit and its control method |
| CN111641333B (en) * | 2020-05-21 | 2021-09-28 | 四川虹美智能科技有限公司 | Multi-carrier period PFC control method |
| TWI761945B (en) * | 2020-09-09 | 2022-04-21 | 國立臺北科技大學 | Power factor corrector |
| CN114336669B (en) * | 2022-03-14 | 2022-06-03 | 东方博沃（北京）科技有限公司 | Control method, device and equipment for rapid reactive compensation and storage medium |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200507431A (en) * | 2003-08-11 | 2005-02-16 | Delta Electronics Inc | Current-balancing method and device for controlling the power-factor-correction circuit interlacedly |
| US20080129260A1 (en) * | 2006-12-04 | 2008-06-05 | Jaber Abu Qahouq | Current sharing for multiphase power conversion |
| CN101217255B (en) * | 2008-01-16 | 2010-12-22 | 艾默生网络能源有限公司 | A PFC circuit with current sharing control module and the corresponding current sharing control method |
| US9077243B2 (en) * | 2012-01-31 | 2015-07-07 | Analog Devices, Inc. | Current-balancing in interleaved circuit phases using a parameter common to the phases |
| CN103532367B (en) * | 2012-07-03 | 2016-12-21 | 珠海格力电器股份有限公司 | interleaved PFC control method and device |
| US9240712B2 (en) * | 2012-12-13 | 2016-01-19 | Power Systems Technologies Ltd. | Controller including a common current-sense device for power switches of a power converter |
| CN203645381U (en) * | 2013-12-13 | 2014-06-11 | 深圳市航盛电子股份有限公司 | Vehicle charger system of electric vehicle |
-
2014
- 2014-07-11 CN CN201410331998.3A patent/CN104135002B/en active Active
- 2014-10-21 DE DE202014011364.5U patent/DE202014011364U1/en active Active
- 2014-10-21 WO PCT/CN2014/089081 patent/WO2016004700A1/en active Application Filing
- 2014-10-21 EP EP14897047.8A patent/EP3168972A4/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
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| WO2016004700A1 (en) | 2016-01-14 |
| EP3168972A1 (en) | 2017-05-17 |
| DE202014011364U1 (en) | 2019-10-11 |
| EP3168972A4 (en) | 2018-04-25 |
| CN104135002A (en) | 2014-11-05 |
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